All livestock are at risk of internal parasite infestation as long as they are kept on pasture. Management of internal parasites is a major component of herd health that greatly improves production. Low internal parasite load translates to improved appetite, increased weight gain and a healthy animal with a strong immune system. The production losses attributable to internal parasite infestation depend on geographical location of animals, the age, nutrition, presence of other concurrent infections, the season and environmental conditions.